| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 2132 |
9.8%
|
| 2 | Weekly | 1590 |
7.3%
|
| 3 | Monthly | 638 |
2.9%
|
| 4 | Yearly | 76 |
0.4%
|
| 5 | Not at all | 17241 |
79.5%
|
| Sysmiss | 3431 |